focal (3) level.3bobcat.gz

NAME

       FBB::level - Manipulator setting the log-level of FBB::Log objects

SYNOPSIS

       #include <bobcat/level>
       Linking option: -lbobcat

DESCRIPTION

       An  FBB::level object is used to specify insertion `forces’ of information that is inserted into FBB::Log
       objects. When inserted into Log objects it defines the `force’ of subsequent insertions (or write  calls)
       into those Log objects.

       Conversely,  Log  objects  may  specify  insertion  `resistances’  through their setLevel members. If the
       level’s `force’ is equal to or exceeds the Log object’s `resistance’ then  the  insertion  is  performed,
       otherwise the insertion is ignored. A single insertion statement may contain multiple level calls. If so,
       then each level call updates the `force’ of insertions following the level call.

       By default insertions into Log objects not preceded by level insertions are completed.

       When a level object is inserted into another kind of std::ostream object the  level  object  performs  no
       actions.

NAMESPACE

       FBB
       All  constructors,  members,  operators  and manipulators, mentioned in this man-page, are defined in the
       namespace FBB.

INHERITS FROM

       -

CONSTRUCTORS

       o      level(size_t force):
              This constructor is used in insertion statements, usually inserting it as anonymous object into an
              FBB::Log object.

       Copy and move constructors (and assignment operators) are available.

OVERLOADED OPERATOR

       o      std::ostream &::operator<<(std::ostream &ostr, FBB::level const &force):
              If  the  ostr  can be downcasted to an FBB::Log object then subsequent insertions are performed if
              force exceeds the Log object’s `resistance’ as specified by its setLevel member.  If ostr does not
              actually  refer to a Log object then ostr is returned without any further action, and ostr handles
              subsequent insertions in its default way.

EXAMPLE

       #include <iostream>
       #include <iomanip>

       #include <bobcat/log>
       #include <bobcat/level>

       using namespace std;
       using namespace FBB;

       int main()
       {
       //    Log &log = Log::initialize("&1"); // uses the static Log object
           Log log;                        // explicitly defining a Log object
           log.open("/tmp/out");           // or at once: Log log{ "/tmp/out" }

           log << "This message is written to cout" << nl <<
                  setw(16) << ’ ’ << "occupying multiple lines\n";

           log.off();
           log << "This message is not shown\n";
           log << "This message is not shown\n";
           log << fnl;
           log << "This message is not shown\n";

           log.on(2);
           log << "This message is shown\n";

           log << level(0) << "not shown" << level(2) << "shown at level 2\n";
           log << level(3) << "at level(3)" << level(1) << "not shown" << fnl;

           log << "separate new line\n";

           log << level(2) << "in business again\n";
           log << "final line\n";
       }

FILES

       bobcat/level - defines the class interface.

SEE ALSO

       bobcat(7), log(3bobcat)

BUGS

       None Reported.

DISTRIBUTION FILES

       o      bobcat_5.02.00-x.dsc: detached signature;

       o      bobcat_5.02.00-x.tar.gz: source archive;

       o      bobcat_5.02.00-x_i386.changes: change log;

       o      libbobcat1_5.02.00-x_*.deb: debian package holding the libraries;

       o      libbobcat1-dev_5.02.00-x_*.deb: debian package holding the libraries, headers and manual pages;

       o      http://sourceforge.net/projects/bobcat: public archive location;

BOBCAT

       Bobcat is an acronym of `Brokken’s Own Base Classes And Templates’.

COPYRIGHT

       This is free software, distributed under the terms of the GNU General Public License (GPL).

AUTHOR

       Frank B. Brokken (f.b.brokken@rug.nl).